Flexible Display Backlight Uniformity via Pivoting Modules
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Solution Overview
Problem
Current designs for flexible display panels in portable electronic devices fail to provide uniform light from the backlight module when the panel is in a non-collapsed position, leading to inconsistent brightness.
Innovation Solution
A display system with two first backlight modules and an outer casing that pivots to cover the flexible display panel, featuring resilient buffers and a second backlight module, ensuring uniform light distribution by abutting contact ends and using a moving mechanism to position the modules coplanarly with the panel in the non-collapsed state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a single backlight module is used, then the structure is simple, but uniform light distribution cannot be achieved when the display is in non-collapsed position
Solution Approach 1:
The backlight system is divided into multiple independent backlight modules (first backlight module and second backlight module) that can be separately positioned and controlled. Each module covers a specific region of the display panel, allowing independent optimization of light distribution for uniform overall illumination.
Solution Approach 2:
The patent introduces a third dimension by positioning backlight modules not only along the length of the display but also across the width, creating a two-dimensional array of backlight modules that collectively cover the entire display surface, enabling uniform light distribution in all directions.
2Illumination intensity
If multiple backlight modules are used to achieve uniform light, then light distribution improves, but manufacturing cost increases
Solution Approach 1:
The backlight modules are designed with multi-functionality, serving both as light sources and as structural support elements for the display panel. The modules incorporate integrated components such as light guides and positioning mechanisms that eliminate the need for separate structural supports, reducing overall part count and manufacturing complexity.
Solution Approach 2:
Multiple functional components are merged into single backlight module assemblies. The light source, light guide, positioning mechanism, and structural support are combined into one integrated module, reducing the number of separate parts that need to be manufactured and assembled, thereby lowering manufacturing costs despite using multiple modules.
3Adaptability or versatility
If the display panel is made flexible and foldable, then portability improves, but maintaining uniform backlight illumination becomes difficult
Solution Approach 1:
The backlight modules are designed with dynamic positioning capabilities, allowing them to move and adjust their positions relative to the display panel. The modules can be positioned close to the panel when flat for optimal illumination, and can be repositioned when the display is folded or bent, maintaining uniform light distribution across different display states through active adjustment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system achieves uniform brightness and luminosity for the flexible display panel while minimizing manufacturing costs through a simple and effective structural design.
Implementation Method 1
The first contact end includes a first resilient buffer that has a light-guiding property
Data Source
AI summary
A display includes a flexible display panel having a back face, two backlight modules disposed on the back face of the display panel and each including a contact end, and an outer casing having two casing panels respectively connected to and supporting the backlight modules oppositely of the display panel. The casing panels are pivotal to move the backlight modules and the display panel between collapsed and non-collapsed positions. In the collapsed position, the display panel is folded, and the backlight modules are parallelly spaced apart. In the non-collapsed position, the display panel is laid flat, the backlight modules coplanarly cover the back face of the display panel, and the contact ends of the backlight modules abut against each other.